Shelf-back sink



1936- E. SCHMIEDEKNECHT 07 I SHELF BACK SINK Filed March 5, 1935 2 Sheets-Sheet l INVENTOR 1936- v. E. SCHMIEDEKNECHT 2,027,707

SHELF BACK SINK Filed March 5, 1935 2 Sheets Sheet 2 INVENTOR Patented Jan. 14, 1936 UNITED STATES SHELF-BACK SINK Victor E. Schmiedeknecht, Louisville, Ky., as-

signor to Standard Sanitary Manufacturing Company,

a corporation of New Jersey Application March 5,1935, Serial No. 9,402

6 Claims.

This invention relates to a sink, and more particularly to improvements in the construction and shape of kitchen sinks having a portion at the back adapted to be used as a shelf. 5 Kitchen sinks having a widened back portion capable of being used as a shelf or shelf-back sinks as they are commonly called, have been made previous to my invention. To my knowledge, however, in each such sink, the back wall connecting the outer edge of the shelf with the bottom of the basin or sink body extended in a vertical plane and consequently the sink was of considerably greater width than a standard plain back sink. This increase in the width of the shelf-back sink over the standard sink was commensurate with the width of the shelf and consequently, the wider the shelf, the greater was the overall width of the sink.

One object of the present invention is to pro- 2 vide a shelf-back sink constructed in such a way as to produce the maximum width of sink body within a minimum overall width.

A further object is to provide a sink having a widened back portion adapted to be used as a 36 shelf, which projects over the basin compartment of the sink. A further object is to provide a shelf-back sink having a substantially standard size sink body in which the front portion of the shelf is connected to the sink basin by a rearwardly sloping wall whereby the overall dimensions of the sink will be materially reduced and be substantially equal to the overall dimensions as a standard plain back sink.

A still further object is to provide a shelfback sink that is simple in construction, economical to manufacture, and can be readily and'commercially molded in a standard two-part molding flask.

These and other objects which will be hereinafter made apparent to those skilled in this particular art are accomplished by means of the following invention, one embodiment of which is described in the following specification and illustrated in the accompanying drawings, in which:

Figure 1 is a front perspective view of a sink made in accordance with my invention;

Fig. 2 is a front plan view of the sink illustrated in Fig. 1;

Fig. 3 is a top plan view of the sink;

Fig. 4 is a section taken on line IVIV of Fig. 3;

Fig. 5 is a section taken online V--V of Fig. 3;

Fig. 6 is a view in vertical section of a molding flask employed in casting my improved sink showing the position of the sink during the cast ing operation; and

Figs. 7, 8 and '9 are views in perspective, top plan and front elevation, respectively, of a sink 5 made in accordance with my invention and having a double drainboard.

Referring to the drawings in detail, I designates a sink formed of enameled cast iron or other material, having a sink body 2, a drain- 10 board 3 connected to one side of the sink body, andan apron 4 which extends around the front and sides of the sink and is connected to the sink body 2 and the drainboard 3 by a rolled rim portion 5; The apron 4 may extend downwardly a distance substantially the full depth of the sink body 2, as shown, or it may terminate slightly below the rim 5 as at the point do, as is customary when the sink is to beenclosed in a cabinet and the like. The corners of the sink body 2 are rounded as at 6, to provide large sweeping Well rounded corners which are unobstructed and easy to clean and the drain 3 is provided with radial grooves 'l for draining into the sink body 2.

At the back, the sink is provided with a relatively wide portion 8 adapted to be used as a shelf. The front edge of the shelf portion projects over the sink body 2 and the drainboard 3 and in order to secure the maximum width of sink body with a minimum overall width of sink, the front end of the shelf is connected to the sink body and the drainboard by a rearwardly sloping wall 9 having a concave curvature which undercuts the protruding shelf 8.

In the casting of my improved sink l, the pattern is tilted angularly with respect to the general vertical surfaces of the sink in such a manher that the line of draft or clearance for extracting the pattern from the mold is in the general direction of the concavity of the back wall 9 of the sink and the front slope of the sink body 2 (see Fig. 6 which illustrates a section taken through a mold after the casting opera: tion has been completed). In this figure, H represents the drag flask and I2 the cope flask of the mold. To prepare the mold, the pattern is placed in the flasks and tilted to such a position that the curved back wall of the pattern and I the front wall of the sink body portion are substantially vertical, after which the drag and cope parts of the mold are filled with sand. After the sand has been tamped around the pattern the cope flask i2 is lifted off the drag and the pattern removed. The cope flask I2 is then replaced and hot molten iron is poured through the iron-pouring passage l3 and gate l4 into the cavity formed by the removal of the pattern. After the metal cools, the cope flask is lifted off the drag flask and the cast sink is then removed from the mold.

By tilting the pattern angularly with respect to the generally vertical surfaces of my improved sink, it is apparent that the line of draft or clearance for extracting the pattern from the mold is in the general direction of the concavity of the back of the sink and the front sloping wall In of the sink body and as a result the cope flask may be readily removed and a twopart mold may be employed in making my improved sink.

While I have illustrated sinks having both a single and a double drainboard and an apron depending substantially the full depth of the sink body, it is to be understood that my improved sink construction is not to be limited to such structures but the fixture may be provided with a multiple of sink bodies and drainboards and with either a full or short apron as desired, without departing from the spirit of my invention or the scope of the appended; claims.

What I claim as new and desire to secure by Letters Patent is:

' l. A cast unitary sink structure comprising a basin, at least one drainboard adjacent said basin, a shelf extending across the back of said structure above said drainboard and overhanging said drainboard and basin, and a back wall extending downwardly and rearwardly from the forward edge of said shelf to the drainboard on one side and merging with the basin back wall at the side of the drainboard; the space defined by the basin walls and said back wall being of such decreasing cross sectional area inwardly from the tops of said walls that the structure can be cast as a unit in a two part flask.

2. A cast unitary sink structure comprising a basin, drainboards on opposite sides of the basin, a shelf extending across the back of the structure above said drainboards and overhanging said drainboards and basin, a back wall extending downwardly and rearwardly from the forward edge of said shelf and merging at points along its length with said drainboards and the rear wall of said basin, a front wall for the basin oppositely disposed with relation to said back wall, having a depth less than said back wall and so located with relation thereto that said walls diverge upwardly from the bottom of said basin.

3. A cast unitary sink structure comprising a basin, at least one drainboard alongside of the basin, a shelf which is positioned above and overlies the basin and drainboard, and a wall formed as a continuation of the basin back wall and as a back wall for the drainboard and which sweeps upwardly and forwardly and joins the front edge of the shelf, and a depending apron surrounding the front and sides of the struc ture; the contours and positions of the walls of the basin and said back wall as well as the apron being such that the structure can be cast as a unit in a two part flask.

4. A unitary cast sink structure comprising a basin, a drainboard adjacent said basin, a shelf positioned above and overlying the basin and wall. extending upwardly at an angle to the vertical to a point above the confines of the basin and constituting the front support for a rear shelf which overhangs the confines of the basin, a front wall for said basin 50 positioned with relation to said rear wall that such walls diverge from the bottom of the basin upwardly, and lateral walls for said basin, slightly diverging from the bottom of the basin to the top thereof whereby the structure can be cast as a unit in a two part flask.

6. A unitary cast sink structure, having a drainboard and a depressed basin with its rear wall extending upwardly and forwardly to a point above its confines and constituting the front support for a rear shelf which extends across the back of the structure and overhangs the drainboard and basin; the front wall of the basin being so positioned with relation to said rear wall that such walls diverge upwardly from the bottom of the basin.

VICTOR E. SCMIEDEKNECHT. 

